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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 600 |
| 3 | 17160 |
| 4 | 563976 |
| 5 | 21095424 |
| 6 | 887785920 |
| 7 | 41589313920 |
| 8 | 2148534533376 |
| 9 | 121416817826304 |
| 10 | 7453542764828160 |
| 11 | 494050046853242880 |
| 12 | 35173674025152638976 |
| 13 | 2677307532371585777664 |
| 14 | 216991376759173367070720 |
| 15 | 18658548982937189595709440 |
| 16 | 1696677198406950703545778176 |
[1,24,600,17160,563976,21095424,887785920, 41589313920,2148534533376,121416817826304, 7453542764828160,494050046853242880, 35173674025152638976,2677307532371585777664, 216991376759173367070720, 18658548982937189595709440, 1696677198406950703545778176] |